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Proceedings Paper

Optimization of MWIR type-II superlattices for infrared detection
Author(s): C. Grein; M. E. Flatté
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Paper Abstract

Type II superlattices (SLs) offer a broad range of design degrees of freedom to help optimize their properties for infrared detection. Under the AFRL STEPS contract, we focus on mid-wavelength infrared (MWIR; 2-5 μm bandpass) Type II structures with two-layer InAs/GaInSb and four-layer "W-structure" InAs/GaInSb/InAs/AlInGaAsSb SL periods. We consider details of the electronic band structures that reduce Auger recombination rates in p-type SLs specifically by affecting the density of final states available to one of the involved carriers. This work assesses the potential impact of final state optimizations on 5 μm band gap SLs in the 200-225 K operating temperature range.

Paper Details

Date Published: 3 May 2010
PDF: 5 pages
Proc. SPIE 7660, Infrared Technology and Applications XXXVI, 76601L (3 May 2010); doi: 10.1117/12.851862
Show Author Affiliations
C. Grein, EPIR Technologies, Inc. (United States)
M. E. Flatté, EPIR Technologies, Inc. (United States)

Published in SPIE Proceedings Vol. 7660:
Infrared Technology and Applications XXXVI
Bjørn F. Andresen; Gabor F. Fulop; Paul R. Norton, Editor(s)

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